216273899 has 8 divisors (see below), whose sum is σ = 226582272. Its totient is φ = 206041000.

The previous prime is 216273877. The next prime is 216273913. The reversal of 216273899 is 998372612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216273899 - 2¹² = 216269803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216273859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12959 + ... + 24504.

It is an arithmetic number, because the mean of its divisors is an integer number (28322784).

Almost surely, 2^216273899 is an apocalyptic number.

216273899 is a deficient number, since it is larger than the sum of its proper divisors (10308373).

216273899 is a wasteful number, since it uses less digits than its factorization.

216273899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37737.

The product of its digits is 326592, while the sum is 47.

The square root of 216273899 is about 14706.2537377811. The cubic root of 216273899 is about 600.2535030638.

The spelling of 216273899 in words is "two hundred sixteen million, two hundred seventy-three thousand, eight hundred ninety-nine".